I messed up my play store...............HELP!!!!!!!!!!!!!!!!!!!

Please don't flame.................but I accidently uninstalled my google play store off my Samsung S3. Obviously now, I cannot get any updates, including titanium backup updates. My phone is rooted. Any of you out there smarter than me have any ideas what I need to do? Can it be downloaded from somewhere? Are there other programs that I also need to run play store? HELP PLEASE!!!!!!!!!!!!!